404 Bulletin American Museum of Natural History. [Vol. XXXIV, 
21. Pheidole kingi torpescens subsp. nov. 
Soldier. Differmg from that of kingi and its subspecies instabilis Emery in the 
shape of the head, which is distinctly shorter in proportion to its width and decidedly 
broader behind than in front (if anything broader in front than behind in kingi and 
instabilis), with the occipital excision deeper and the occipital groove broader. The 
intermediates also have the same type of head, whereas in the forms previously 
mentioned it is distinctly broader in front than behind. In instabilis the head is 
- darker in color, while in torpescens it is uniformly ferruginous red as in the soldier. 
Worker. Colored like the worker of the true kingt and therefore paler than in 
imstabilis, with the antennal scapes extending well beyond the posterior corners of 
the head as in that form (in kingi reaching only a little beyond the posterior corners). 
The epinotum bears minute spines or teeth as in kingt. These are reduced to mere 
angles in instabilts. : 3 
Described from single soldier and worker specimens and two intermedi- 
ates taken from a small nest under a stone near the Carnegie Desert Labo- 
ratory at Tucson, Arizona. 
pry 
& 
22. Pheidole xerophila pacifica subsp. nov. 
Soldier. Differing from the typical xerophila Wheeler in the following particu- 
lars: the head is slightly broader behind, much less punctate on its posterior = and 
therefore as in the subsp. tucsonica Wheeler and of a deeper red color, with a black 
spot on the vertex. The sculpture of the thorax is much as in the typical zerophila, 
with the pronotum shining, but the petiolar node is excised as in tucsonica. The 
_ epinotal spines are more slender and somewhat longer than in either of the previously 
described forms. The thorax, pedicel and gaster are dark chestnut brown or blackish, 
the legs and posterior edges of the gastric segments yellowish brown. 
Worker. Differing from the workers of xerophila and the subsp. tucsonica espe- 
cially in the sculpture of the head and in the paler color. The head is subopaque 
or shining only on the vertex, not glabrous behind the cheeks but with the whole 
upper surface delicately longitudinally rugulose and reticulate-punctate. Specimens 
vary from light to dark castaneous brown, the head and thorax being sometimes. 
nearly black, the mandibles, clypeus, antenne and legs light yellowish brown. 
Female. Length: 5.5-6 mm. 
Head subrectangular, broader than long, broader behind than in front with 
straight sides and posterior border. Antennal scapes reaching halfway between the 
eyes and the posterior corners of the head. Thorax as broad as the head, flattened 
above, base of epinotum half as long as the declivity; spines stout, as long as broad 
at their bases. Petiole similar to that of the soldier, postpetiole about twice as broad 
as the petiole, and nearly twice as broad as long, its sides produced in the middle as 
two rather blunt points. Gaster suboblong, more than twice as long as broad, 
flattened dorsoventrally. Wings long (nearly 7 mm.). 
Mandibles shining, coarsely and sparsely punctate. Head opaque, longitudi- 
nally rugose, with punctate or reticulate interrugal spaces. Thorax and gaster 
